Good news, looks like the first kabini itx motherboard should be on the market shortly according to this article(August 22nd).
20,000 JPY for the A6-5200 (or $205) itx board or
12,000 JPY for the E1-2100 (or $123) itx board

I expect them to be significantly cheaper state side, can't wait to see them pop up on newegg/amazon!